418 



THE MERYCOIDODONTID/E 



E poreodon — Cont. 



occidentalis, 5, 10, 16, 18,62,63,64,66,67, 71,75, 

 76, 79, 81-83, 84, 123; fig'd, 82; meas., 282; 

 skel., 83 

 occidentalis leptacanthus = E. leptacanthus, 70 



facifcus = E. pacificus, 8 3 

 pacificus, 5, 10, 15, 16, 18, 63, 64, 67, 68, 71, 72, 



74, 83-84; fig'd, 327; meas., 282 

 parvus, 5, 10, 16, 18, 63, 64, 69, 84-86; fig'd, 85; 



meas., 282 

 ferbullatus = E. longifrons perbullatus, 72 

 relictus — E. major rel ictus, 78 

 socialis, 5, 10, 15, 18, 63, 64, 69, 77, 81, 86-95, 96; 

 brain cast, 263-265, 41 1 ; fig'd, 86, 87, 89, 90, 91, 

 93, 94, 95, 263, 395, 411; meas., 265, 282; skel., 

 89, 95, 395 

 suferbus = Promerycochoerus superbus, 141 

 thurstoni, 5, 10, 13, 18, 63, 64, 96; fig'd, 397; meas., 



282; skel., 96, 397 

 trigonocephalus, 5, 10, 16, 18, 63, 64, 66, 76, 86, 



96-97, 123; fig'd, 327; meas., 282 

 trigonocefhalus -parvus r= E. parvus, 84 

 sp., 10, 13, 16 

 Equus, 50, 261 

 erythroceps (Promerycochoerus), 5, 11, 13, 20, 105, 106, 



119; fig'd, 341; meas., 283 

 Espanola, N. Mex., 15, 207 



Eucrotaphus, 10, 18, 26, 27, 31, 61, 62, 63, 232 

 auritus, 61 



dickinsonensis =Eporeodon dickinsonensis, 68 

 helena; = Eporeodon helenx, 69 

 jacksoni, 5, 10, 17, 18, 61-62, 81; fig'd, 313 

 jacksoni leptacanthus = Eporeodon leptacanthus, 70 



pacificus = Eporeodon pacificus, 83 

 major = Eporeodon occidentalis in part, 81 

 longifrons = Eporeodon longifrons, 7 1 

 montanus = Eporeodon montanus, 80 

 superbus = Promerycochoerus superbus, 141, 145 

 trigonocephalus = Eporeodon trigonocephalus, 96 

 euryops (Merychyus) = nomen nudum, 19, 217, 228-229 

 Extinction, causes of, 271-275 



jeliceps (Brachymeryx) = Cyclopidius simus, 249, 254 ; 

 fig'd, 387 



{Cyclopidius) = C. simus, 15, 18, 254; fig'd, 387 

 Flatau, E., 262 



Flint Creek formation, 4, 5, 187, 190, 197, 200 

 Florida, 170 

 Food, 1,271,272 



Fort Laramie, Wyo., 14, 17, 61, 157 

 Fort Logan formation, 4 

 Fort Logan, Mont., 14, 15 

 Fort Mitchell, Nebr., 14, 15, 235, 239 

 Fossil Horse Beds, Ore., 16, 70 

 Fox Creek Gap, Wyo., 17, 102 

 Frick, C, 2 



Gazin, C. L., 153, 212 

 Geary's Ranch, Colo., 13, 14 

 Generic characters, summary of, opp. 24 

 Geographic distribution, 10-17 



Geologic background, 7-9 



Geologic distribution, 1, 2, 4-6; fig'd, 25 



Gering formation, 4, 5, 9, 246 



Gervais, P. M., 262 



Gilmore, C. W., 3, 57 



Goshen Hole, Wyo., 14, 17, 54 



gracile (Oreodon) = Merycoidodon gracilis, 56 



gracilis (Merycoidodon), 5, 11, 13, 15, 16, 17, 19, 26, 30, 



43, 44, 45, 46, 47, 53, 55, 56-57, 59, 235, 238, 250; 



brain cast, 262-263; fig'd, 29, 313, 393; meas., 280; 



sinus paranasales, 270; skel., 57, 393 

 gracilis coloradoensis (Merycoidodon) = M. gracilis, 19, 



56, 57; fig'd, 317 

 grandis (Promerycochoerus) = P. montanus grandis, 27 

 grandis (Promerycochoerus montanus), 5, 11, 15, 20, 105, 



106, 122, 123, 125, 138, 139-141, 145, 147; fig'd, 27, 



140, 347; meas., 285; skel., 141 

 Granger, W., 2 



Grasshopper Creek, Mont., 13, 187, 189 

 Gratiolet, P., 262 

 Great Canyon, Ore., 16, 128 

 Green River, Utah, 14, 16, 39 

 gregoryi (Promerycochoerus), 5, 11, 16, 20, 105, 106, 



119-121, 123; fig'd, 120, 335, 403; meas., 283; skel., 



121, 123, 403 



loomisi (Promerycochoerus), 5, 11, 17, 20, 106, 121, 

 122-123; fig'd, 337, 403; meas., 284; skel., 122, 



123, 403 

 Griggs, R. F., 274 



Habitats, 7-9, 24-25, 271-275 

 Harper, Ore., 16, 170, 212 

 Harrisburg, Nebr., 15, 235 

 Harrison formation 



Lower, 4, 5, 8, 9, 76, 98, 102, 103, 105, 106, 122, 



124, 125, 127, 139, 147, 171, 173, 193, 229, 

 231, 232, 234, 239 



Upper, 4, 5, 8, 9, 154, 156, 217, 218, 219 

 Harrison, Nebr., 54 

 harrisonensis (Merychyus), 5, 10, 15, 17, 19, 217, 229- 



231 ; fig'd, 229, 230 ; meas., 290 

 hatcheri (Promerycochoerus) = P. hollandi hatcheri, 125 

 hatcheri (Promerycochoerus hollandi), 5, 11, 15, 20, 105, 



106, 123, 125-127 ; fig'd, 126, 339; meas., 284 

 Hay, O. P., 23, 42, 45, 65 

 Hayden, F. V., 66, 226 

 Hayden's Bed D, 4, 5, 157 

 Hayden's Bed E, 157 

 Hayden's Bed F, 4, 5, 205, 206, 226 

 Haystack Valley, Ore., 14, 16, 64, 66, 70, 71, 81, 83, 84, 



130, 135, 178 

 Helena, Mont., 13, 14, 58, 80, 124, 125, 139, 171, 173 

 helenas (Eporeodon), 5, 10, 13, 16, 18, 63, 64, 69-70; 



fig'd, 319; meas., 281 

 heletim (Eucrotaphus) = Eporeodon helena;, 69 

 Hellgate River, Mont., 13, 127 

 Hermosa, So. Dak., 14, 16, 256 

 hesperus (Promerycochoerus), 5, 11, 13, 20, 105, 106, 



119, 123-124; fig'd, 124; meas., 284 

 heterodon (Cyclopidius) = ? C. simus, 15, 18, 242, 249, 



254-255; fig'd, 387; meas., 255 



